Flash type steam iron construction



Oct. 4, 1949. R. H. EDWARDS 2,483,816

/FLASH TYPE STEAM IRON CONSTRUCTION' Filed March 21, 1945 4 Sheets-Sheetl i r g Ofl/ l l 4 v l ,OJ @a FlsJ.

WITNESSES: INVENTOR ATTORNEY Fla Oct. 4, 1949. R. H. EDWARDS FLASH TYPESTEAM IRON QONSTRUCTIQN Filed uarcn 21, 1945 ,4 Sheng-Sheet 2 INVENTORRoY H. Enwnnos BY K TTORNEY Oct. 4, 1949. R. H. EDWARDS FLASH TYPE STEAMIRON CONSTRUCTION 4 sheets-sheet s Filed March 21, 1945 ATroRNEY Oct. 4,1949. H. lEDWARDS 2,483,816

FLASH TYPE STEAM InoN CONSTRUCTION v Filed March 21, 1945 4:sheets-sheety 4 ORNEY Patented Oct. 4, 1949 FLASH TYPE STEAM IRONCONSTRUCTION Roy H. Edwards, Mansfield, Ohio, assig'nor to WestinghouseElectric Corporation, East Pitts. burgh, Pa., a corporation ofPennsylvania.

Application March 21, 1945, serial No. 533,903

7 Claims. (Cl. 38-77l My invention relates to a steam iron of the typein which a liquid, such as water, is adapted to be flashed into steamand discharged onto a fabric being ironed.

One object of the invention is to produce an improved iron of the typeset forth.

An iron of theV kind referred to includes, as main component elementsthereof, a soleplate, a tank for containing the water to be flashed intosteam, and a handle for manipulating the iron.

A further object of the invention is to produce improved means forassembling the main component parts of such iron.

A still further object of the invention is to produce improved means forassembling an iron of the type set forth which will compensate forslight dimensional variations of the various parts of the iron, thuseliminating the necessity for working to close tolerances in fabricatingor machining the parts of the iron. 1

A still further object is to produce improved means for assembling thevarious parts of the iron which is adapted to take up any play betweenthe parts that may initially exist, or which may develop while the ironis in use, to prevent rattling of such parts.

A still further object of the invention is to produce improved means forassembling the soleplate, the tank containing the water to be ilashedinto steam and the handle of the iron in such a manner as to insurelluidtight connections between the soleplate and the tank, regardless ofslight variations in the sizes of the coacting parts.

A further object of the invention is lto produce improved means forassembling an iron whereby the handle, tank and soleplate are tensionedagainst each other to prevent loosening of the means interconnectingsaid parts.

These and other objects are effected by my invention as will be apparentfrom the following description and claims taken in connection with theaccompanying drawings, forming a part of this application, in which:

Fig. l is a vertical sectional view of a steam iron embodying myinvention;

Fig. 2 is a section on line II-II of Fig. 1;

Fig. 3 is a fragmentary sectional view, on an enlarged scale, takenalong line III-III of Fig. `1;

Fig. 4 is an exploded View of the iron shown in Fig. 1 to betterillustrate the manner of assembling the various parts of the iron;

Fig. 5 is a view, partly in vertical section and partly in sideelevation, of another embodiment of my invention;

Fig. 6 is a fragmentary section taken on line VI-VI of Fig. 5;

Fig. 7 is a fragmentary section taken on line VII-VIIof Fig. 5; and

Fig. 8 is a fragmentary section similar to Fig. 'I but showing a furthermodification.

As illustrated, the iron includes a soleplate I0,

a tank I2, a handle I 4,' and a nished cover I5 positioned between thehandle and the soleplate and enclosing the tank and the upper portion ofthe soleplate. As clearly shown in Fig. 1, the lower portion of thecover I 5 seats on or engages a marginal portion of the soleplate andthe upper portion of the cover forms a support for the handle I4.

The soleplate is heated by a heating element I6 and is provided with awell I8, for receiving a thermostat 20, and a steam generating chamber22, for receiving water from the tank I2 to be flashed into steam. 'I'heheating element and the thermostat are connected by conductors 24 to asource of electrical energy in any well-known manner. The soleplate isalso provided with pas-. sages 26 leading from the steam generatingchamber to ports 28 through which steam is discharged onto the fabricbeing ironed.l The steam passages 26 and the discharge ports are definedby the soleplate I0 and a gasket 30 and a cover plate 32 which aresecured to the soleplate by screws 34. The steam generating chamber 22is provided with a cover 36 overlying an opening 31 in the cover plate32 which is aligned'with the chamber 22. The cover plate 36 has anopening 38 therein for receiving means for admitting water to thechamber 22. A gasket 39 is positioned between the cover plate 36 and thecover plate 32 to eiiect a. uidtight seal. The cover iate 36 is securedto the soleplate by the screws The thermostat 20, which is shown onlydiagrammatically, is preferably of the unitary type which may beassembled and calibrated before it is positioned in the well I8. Thethermostat is 1 carried by a disc or plate 40 which is secured inposition by any suitable means. The plate 40 forms a closure for thethermostat well and carries a sleeve or bushing 44 'in which athermostatadjusting stem 46 is threaded. 'I'he stem 46 extends throughan opening in the cover l4|! to contact the adjusting lever of thethermostat.

The cover 32 is provided with an opening @8 for receiving the lower endof an open-ended vent tube 5o for equalizing the pressure between thesteam passages 26 and the tank I2.` The soleplate is also provided withtapped holes for ening 95.

3 gaging the threaded ends of fastening bolts 62 and 54. The parts thusfar described, except for the bolts 62 and 54, are secured together toform a self-contained subassembly which is generally designated bytheletter A in Fig. 4.

The tank l2 is provided with a sleeve 58, through which the fasteningbolt 52 passes, and a sleeve 58 through which the thermostat-adjustingstem 66 extends. The second fastening bolt 55 passes through the venttube 60, the lower end of which is soldered, or otherwise secured influidtight relation, to the bottom of the tank at 66. The tank is alsoprovided with a sleeve 62, the lower end of which threadedly engages ahollow bushing or nipple 6d. The interior of the bushing communicateswith the tank through one or more openings 66 in the sleeve 62 and withthe steam generating chamber 22 through` `an orince 68. The orifice 68is adjusted, or completely closed, by a needle valve 'l0 which extendsupwardly through the sleeve 62. The valve l is biased downwardly by aspring 63. It will be understood that the upper and lower ends of thesleeves 56. 58 and 62 are soldered, or otherwise secured, in iiuidtightrelation'to the top and bottom walls of the tank as at 1|. The nipple 64extends into the steam generating chamber through the opening 38 in thecover 36 and is provided with a ange 'l2 which engages or rests on agasket 'i3 placed on top of the cover, as best Shown in Fig. li.

The upper end of the valve is provided with an arm 1li having anupwardly-projecting lug 'i6 which is adapted to be engaged by a leveri8, rotatably mounted on the thermostat-adjusting stem 46, and adownwardly-projecting lug 80 adapted to ride on a cam 82 carried by, androtatable with, the thermostat-adjusting stem. When the thermostat stemis turned to increase the temperature of the iron, the lug 80 rides on ahigh portion of the cam 82, thus raising the needle valve l0 andincreasing the flow of water through the oriiice 68. By rotating thelever 18 about the vertical axis of the thermostat-adjusting stem, thelug 80 of the arm 'I4 may be made to ride on a low portion of, or maybecompletely disengaged from, the cam 82, thus permitting the spring 63 tomove the needle valve downwardly to completely close the orice 88. Thethermostat-adjusting stem and the valveactuating lever are provided withoperating knobs 86 and 88, respectively.

The tank is also provided with a baille 90, which, for the purpose ofthe present application, need not be described in detail, and 'with atubular extension or dome 92 which is secured in fluidtight relation tothe tank at 96. The dome 92 extends upwardly into an opening 93, formedin the front end of the handle, and communicates with the steam passages26 through a side opening 96 formed in the upper portion of the venttube. Within the dome 92 is a spout 98, having a closed top and an openbottom and provided 'with a side inlet opening I 00. The spout 98 isadapted to be pulled outwardly through an opening 95 in the top of thedome so that water may be poured into the tank through the inlet opening|00, as shown in Fig. 4. This is done with the iron in up-ended positionor resting on its heel. 'I'he spout is biased back into position withinthe dome by a spring |02. 'I'he top of the spout is provided with a lug|03 which will be further referred to.

A gasket |05 prevents leakage through the open- 4 The tank and the partsassociated therewith may all be secured together to form a subassemblywhich is designated by the letter B in Fig. 4.

The handle I4 includes a lower portion |04 and I an upper portion |06which are secured together in a concealed and easily detachable manner.As shown, the rear end of the upper portion is provided with aninwardly-projecting plate |08 which is secured in position by a screw||0. The plate |08 is adapted to engage the underside of a plate |I2secured, by the screw 52, to a lug ||3 carried by the lower handleportion |04. The front ends of the inner and outer portions of thehandle are secured together by a screw ||4.

The bottom of the lower handle portion is provided with an opening ||5and a, slot through which the thermostat-adjusting stem 46 and the lever18, respectively, project to receive the operating knobs 86 and 88.

' The handle also includes a knob |22 which is adapted to seat inrecesses ||8 and |20 in the front end of the lower and upper handleportions, respectively, so that, when' it is in the position as shown inFig. 1, the knob merges with, and forms urszontinuation of, the handleportions |04 and The knob |22 serves as a grip by means of which thespout 98 may be pulled out when it is desired to introduce liquid intothe tank. To this end, the knob |22 is provided with a bottom recess |23adapted to receive the lug |03 of the spout 96. A screw |24 extendsthrough an opening |26 formed in the lower portion of the knob, and isthreaded into an opening |27 formed in the lug |03 to secure the knob|22 to the top of the spout 98.

In order to produceand maintain the desired iit and the necessaryfluidtight connections, without having to work to extremely closetolerances in manufacturing or in assembling the parts, in order toprevent rattling of the parts which may result from liberalmanufacturing tolerances, and in order that the iron may be easilydismantled for servicing, if necessary, Without disturbing thecalibration of the thermostaat or the adjustment of the water valve, Ihave devised improved means for detachably securing the handle, tank andsoleplate subassemblies together.

As shown in Figs. 1 and 4, the cover plate 32 of the soleplate isprovided with a recess |28 forming a seat for an annular gasket |30 anda washer |32 through both of which the lower end of the vent tubeextends. The gasket |30 is compressed between the soleplate and thewasher |32, by a coil spring |34, confined between the washer and thebottom of the tank. This provides and maintains a fluidtight seal aroundthe vent ube and yieldably supports the front end of the ank.

The rear portion of the tank is likewise cushioned by a spring |36, thelower end of which rests on top of the tank, and the upper end Vof whichis seated in a pocket |38 formed in the underside of the lower handleportion |04. The yielding pressure of the spring |36 causes the flange'I2 of the bushing 64 to maintain a fluidtight seal against the gasket13.

The rear end of the handle is fastened to the soleplate by the rearscrew 52 which passes through the apertured plate ||2 and lug ||3, andthrough the sleeve 56 to engage the soleplate.

The front end of the handle is secured to the soleplate by the screw 54which passes through an opening in the top of the dome 92 and throughthe vent tube 50 to. engage the soleplate. As will be best seen fromFig. 3, the front end of the handle is provided with a shouldei` |40adapted to receive, or to be engaged by a portion of, an aperturedwasher |4 2 through which the screw 54 passes so that the front end ofthe handle is clamped between the head of the screw I4 and the soleplateof the iron.

The screws 52 and 54 are tightened until the cover I5 is rmly clampedbetween the handle and the soleplate. This eliminates the necessity ofmachining the cover to very close tolerances and thus reduces the costof manufacture.

The opening in the top of the dome through which the screw 54 passes isprovided with a gasket |44. The spring |34, by exerting a followingupward pressure against the tank, compresses the gasket |44 to maintaina uidtight seal around the stem of the screw 54.

The springs |34 and |36, in addition to maintaining a iluidtight seal atthe lower end ofthe vent pipe, at the upper end of the screw 54, and atthe lower end of the water valve, also take up any looseness or playresulting from variable tolerances in the manufacture of the handle, the

tank or the soleplate, or any of them, properly to locate the tank withreference to the soleplate and the handle. This eliminates the necessityof working to very close tolerances and thus reduces the cost ofmanufacture.

. Assembly The gasket |30 and the washer |32 are placed in the seat |28in the cover 32 of the soleplate, the gasket 13 is placed on top of thecover plate 36 of the steam generating chamber, and the spring |34 isslipped over the lower end of the vent tube 5|). The tank sub-assembly Bis now placed on top of the soleplate subassembly A, with the lower endof the vent tube 50 projecting into the steam passage 26 through theopening 48 and with the nipple 64 projecting into the steam generatingchamber through the opening 38. The flange 12 of the nipple 64 now restson the gasket 13, the thermostat-adjusting stem 46 passes upwardlythrough the sleeve 58, and the valve 1|! extends through the sleeve 62.

The cam 82 is now slipped over the upper end of the thermostat-adjustingstem and the follower arm 14 is threaded onto the upper end of the valve10. As shown, the cam 82 rests on a thrust washer seated in a depressionformed in the top wall of the tank, but it will be' understood thatl iswell understood in the art. The cam 82 and follower arm 14 are next soadjusted relative to each other that, when the cam is in an oi position,or when the cam is so adjusted as to main tain the iron at a temperatureat which water will not evaporate rapidly, the lug 80 of the arm 14 willride on a low portion of the cam, which will permit the spring 63 tobias the valve 10 into a position completely closing the orifice 68.Conversely, when the lug 80 rides on the highest *portion of the cam,the valve 10 is raised fully'to open the orifice 68. The arm 14 is thensuitably locked in position relative to the valve 10 to prevent anychange in its adjustment relative to the cam 82. The actuating lever 18is then placed in position, with the forked end thereof engag ing thelug 16 ofthe arm 14.

The finished cover or shell I5 is next placed 6 in position and thelower handle portion is placed on top of cover I5, with the spring |30engaging the pocket |38, with the end of the thermostat-adjusting stemprojecting through the opening ||5, and with the end of the water valveactuating lever 18 projecting through the slot ||1. With the lowerhandle portion-in position, the plate II2 is placed on the lug |I3, andthe screw 52 is passed through the plate ||2, lug I|3 and sleeve 56 toengage the soleplate. The outer handle portion is now moved towards theinner handle portion in a manner to cause the plate |08 to engage theunderside ofthe plate I I2 whereupon the outer handle portionis swimgfrom the position shown in Fig. 4 to the position shown in Fig. 1,-forapplication of the screw II4.

To secure the front end of the iron, the gasket- |44 is placed on top ofthe dome 92 in registration with the vent tube, and the washer |42 isplaced over the gasket |44 and on the shoulder |40 in the front of thehandle. The screw 54 is now passed through the washer |42, the gasket|44, the opening in the top of the dome, and through the vent tube 50 toengage the soleplate.

To secure the knob |22 to the spout 98, the spout is pulled outwardlythrough the opening (see Fig. 4)., the gasket |05 is placed on top ofthe dome, the lug |03 is inserted into the recess |23, and the screw |24is applied.

From the foregoing, it will be seen that the screws 52 and 54 to locatethe tank and to `pro duce a proper t between the handle, the tank andthe soleplate, even though these parts, or any one or two of them, maynot have been fabricated or machined to extremely close tolerances, andthat these springs, by taking up any play that may exist, preventrattling of the parts. Also, the pressure of the springs |34 and |36minimizes, or altogether prevents, loosening ofthe screws 52 and 54while the iron is in use. will further be noted that thepressure of thespring |35 maintains a luidtight joint at the top of the steamgenerating chamber, and that the pressure of the spring |34 maintains atight joint at the top of the dome 92 around the stem of the screw 54and around the lower end of the vent tube which extends into the steampassages 26.

Furthermore, when the screws 52 and 54 are disengaged, the soleplate maybe detached from the tank without in any way disturbing the calibrationof the thermostat or the adjustment of the water valve.

It will further be noted that in the structure above described, thehandle I4, the cover I5 and the soleplate I0 are rigidly clampedtogether by the bolts 52 and 54 and that the tank I2 is located withreference to the handle and the soleplate by means of the springs |34and |36.

In Figs. 5 to 7, there is shown a preferred embodiment in which thejunction of the vent tube 50 with the soleplate I0 is sealed by aresilient gasket positioned between the bottom of the tank and thesoleplate, and in which the front portion of the tank is clamped to thesoleplate while the cover I5 is located and held in position against thesoleplate, by yielding means disposed between the cover and the handle.

As shown, a relatively thick resilient gasket |46 is placed between thebottom of the tank and the soleplate cover, so as to surround the lowerend of the vent tube 50, and the front portion of the tank is clamped tothe soleplate by the front screw 54. Tightening the screw 54, to clampthe front portion of the tank against the soleplate,

also compresses the gasket |48 and provides the desired seal at thelower end of the vent tube 50.

Also, as shown, a corrugated leaf spring |48 is placed between the frontportions of the handle and the cover so as to press'the cover downwardlyagainst the marginal portion of the soleplate. The spring |48 may be ofany desired form and size.

If desired, the rear fastening screw 52, the pocket |38, and the spring|36 of Figs. 1 to 4 may be replaced by a bowed leaf spring |50 and afastening bolt |52. As illustrated, the rear portion of the handle isrigidly secured to the corresponding portion of the sole-plate by thebolt |52, and the rear portion of the cover is rigidly clamped inposition between the handle and the soleplate. The spring |5, the freeends of which bear upon the rear portion of the tank, may be rigidlysecured to the bolt |52 so as to have predetermined pressure, or itspressure may be adjusted by a nut |55 engaging the threaded portion |56of the bolt |52.

The pressure of the spring |50 against the rear portion of the tankserves to eiect a fiuidtight joint between the water valve and the steamgenerating chamber in the same manner as the spring |35 of theembodiment of Figs. 1 to 4.

It will be seen that in the embodiment of Figs. 5 to '7 the frontportion of the tank is firmly secured to the soleplate while the coveri5, or at least the front portion thereof, is yieldably` pressed againstthe soleplate.

It will also beA seen that, in both of the embodiments illustrated, atank member and a cover member are interposed between the handle and thesole plate and that, in one embodiment, one of the members, such as thetank, is yieldingly .located or positioned and the cover member isrigidly clamped, and that, in the other embodiment, the tank isyieldingly located and the cover member is yieldingly located orpositioned at its front portion. In both embodiments, however, thestructure is such that the tank, soleplate, the cover and the handleneed not be `fabricated or machined to very close tolerances, thusreducing the cost of manufacture and assembly without adversely aectingthe structural strength or the appearance of the iron.

Also, in both embodiments of the invention, means is provided foreffecting and maintaining iluidtight seals at the lower end of the watervalve, at the lower end of the. vent tube, and at the upper end of thefastening screw 56.

Since, except as hereinabove pointed out, the structure of theembodiment of Figs. 5 to "I is identical with that shown in Fig. 1, theembodiment of Figs. 5 to 7 is only partly shown in detail and, to theextent that the parts of this embodiment are Shown, they are referred towith the same reference characters used in connection with Fig. 1.

If desired, the spring |50 may be omitted and the rear portion of thetank may be adjustably clamped by the nut |56 bearing directly on thetop of the tank as shown in Fig. 8. y

While I have shown my invention in several forms, it will be obvious tothose skilled in the art that it is not so limited, but is susceptibleof various other changes and modifications without departing from thespirit thereof.

What I claim is:

-1. A steam iron including a handle, a soleplate, a heating elementtherefor, a tank 'adapted to contain water to be changed into steam anddischarged onto the fabric being ironed, a steam yrim of said opening,means securing said handle,

said soleplate, and said tank together, and means for exerting afollowing yielding pressure on said nipple, to produce and maintain auidtight joint between said cover and said flange, said means being inthe nature of a spring, confined between said handle and a portion ofsaid tank in proximity to the vertical axis of said nipple, to exertdownward pressure against said tank in the vicinity of said nipple.

2. A steam iron including a soleplate, a heating element therefor, asteam generating chamber carried by said soleplate. a tank adapted tocontain water to be changed into steam in said chamber and to bedischarged onto the fabric being ironed through ports formed in saidsoleplate, there being a passage connecting said ports and said chamber,a cover for said passage having an opening therein, a vent tube carriedby said tank and having its-lower end extending through said openinginto said passage. and its upper end communicating with the interior ofsaid tank to equalize pressure between said tank and said passage,packing means at the junction of the lower end of said tube and saidcover, means securing said tank to said soleplate, and a spring confinedbetween said packing and the bottom of said tank for exerting pressureagainst said packing to produce and maintain a uidtight joint betweenthe lower end of said tube and said passage.

3. A steam iron including a soleplate, a heating element therefor, asteam generating chamber carried by said soleplate, a tank adaptedtocontain water to be changed into steam in said plate, there being apassage connecting said ports and said chamber, a cover for said passagehav- 4 ing an opening therein, a vent tube carried by said tank andhaving its lower end extending through said opening into said passage,and its upper end communicating with the interior of said tank, toequalize pressure between said tank and said passage, packing means atthe junction of the lower end of said tube and said cover, a fasteningscrew passing through an opening in the top of said tank and throughsaid vent tube to engage said soleplate, packing means between the topof said tank and the head of said screw, and a spring confined betweenthe packing at the lower end of said tube and the bottom of said tankfor exerting downward pressure against the last-mentioned packing, andupward pressure against the packing between the top of said tank and thehead of said screw, to produce and maintain iiuidtight joints betweenthe lower end of said tube and said passage, and between the top of saidtankand said screw.

4. A steam iron including a soleplate, a handie for manipulating saidiron, a tank disposed between said handle and said soleplate, a coverdisposed between said soleplate and said handle and enclosing said tank,fastening means securing said soleplate and said handle together. meansexerting a yielding pressure, in opposite 9 directions. against aportion of said cover and a juxtaposed portion of said handle, and meansexerting yielding pressure, in opposite directions, against saidfastening means and a juxtaposed portion of said tank.

5. A steam iron including a soleplate, a handle for manipulating saidiron, a tank disposed between said handle and said soleplate, a coverdisposed between said soleplate and said handle and enclosing said tank,a first fastening means securing said soleplate, the front portion ofsaid tank and the front portion of said handle together, means exertinga yielding pressure, in opposite directions, against a front portion ofsaid cover and a juxtaposed front portionof said handle, a secondfastening means securing a rear portion of said handle to a rear portionof said soleplate, and means exerting yielding pressure, in oppositedirections, against said second fastening means and a juxtaposed rearportion of said tank. v

6. A steam iron including a soleplate, a heating element therefor, afsteam generating chamber carried by said soleplate, a tank adapted tocontain water to be changed into steam in said cham- -ber and tobedischarged onto the fabric being ironed through ports formed inl saidsole plate, there being a passage connecting said ports and saidchamber, a cover for said passage having an opening therein, a vent tubecarried by said tank and having its lower end extending through saidopening in communication with said passage and its upper endcommunicating with the interior of said tank to equalize pressure insaid tank and said passage, and a fastening screw passing through anopening in the top of said tank and through said vent tube and engagingsaid soleplate for securing said vtank and soleplate together.

'7. A steam iron including a soleplate, a heating element therefor, asteam generating chamber carried by said soleplate, a tank adapted tocontain water to be changed into steam in said chamber and to bedischarged onto the fabric being ironed through ports formed in saidsoleplate, there being a passage connecting said ports .and saidchamber, a cover for said passage having an opening therein, a Vent tubecarried by said tank and having its lower end extending through saidopening in communication with said passage, its upper end communicatingwith the interior of said tank to equalize pressure in said tank andsaid passage, a fastening screw passing through an opening in the top ofsaid tank and through said vent tube to engage said soleplate, a handlemember, and means associated with the upper end of said screw forengaging a portion of said handle to secure it in operative relationwith said tank and said soleplate.

, ROY H. EDWARDS.

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